How to Find Dead Pixels in LCD

You can find dead LCD pixels by changing your desktop's color.

LCD, or liquid crystal display, is when a monitor uses liquid crystals between two polarizing sheets. The crystals align when an electric current passes through it. All LCD monitors are made up of thousands of tiny pixels, which are composed of red, green and blue color cells. Together, the pixels create the images seen on a monitor. After use, however, many LCD screens get "dead" or "stuck" pixels, which is when the color cells fail to work. They can be identified by simply searching your computer screen.

Instructions

1. Close all windows and go to your desktop.

2. Right-click on your desktop and click "Personalize" to change your desktop's settings.

3. Change your current wallpaper to a solid white background and save the settings.

4. Open the desktop again and search for black or dark spots on the white screen. These are the dead pixels.

5. Right-click on your desktop again and click "Personalize." Change the white wallpaper to a solid black wallpaper and save the settings.

6. Open the desktop again and search for any white spots. These are where red, green and blue pixels have stopped working. Red, green or blue spots means one of the colors in the pixel has stopped working.

Tips & Warnings

• You can also change your desktop's background to red, green, blue or yellow to find more dead pixels in an LCD monitor.

References

• Dark Vision Hardware: How to Check LCD Displays for Dead Pixels